Before starting this unit the students should already have a good understand of
one ... Benchmark: The student will und erstand the nature of force and motion.
Ja son Koester
General Physics Lesson Plan 2D Motion Before start ing thi s unit the stude nts s ho uld already ha ve a good und er stand of o ne dimen sion moti on. They s ho uld be fa m iliar with moti on equ ation s and be co mfo rta b le usin g them .
Objectives Th e understandin g of the moti on o f o bjec ts in two d im en si on s both co nce ptua lly and experimentally. Wh en completed the students sho uld have an understandin g of the ve rtica l and ho riz ontal co m po nents and ho w th e y rel ate to eac h o the r. S trand : Ph ysic al Sci en ce E ner g y Tran sfo rm ati on s Substrand: Benchm ark : T he student will und erst and en ergy fo rms, tran sformati ons and transfer s. St and ard s: 1. Th e stude nt w ill kno w tha t potenti al energy is sto red en erg y and is associ ated with g ra vi tatio na l or e lectrical fo rce, mechani c al positi on o r c he m ica l co m posi tio n. 2. T he studen t will differenti ate bet ween kineti c and po te ntia l e ne rgy and identif y situa tions where ki ne tic en ergy is converted into pot enti al en ergy and vice ve rsa . Substrand : M oti on Benchmark : T he student w ill und erstand the nature of force and moti on . S ta nda rds: I . T he s tude nt will use Newton ' s three laws of moti on to qualitati vely and quantitativ el y descri be the inte racti on of o bjects . 2. T he student will des cribe the effect of friction and gravi ty o n th e moti on of an o bject.
T his unit contain s lecture , worksheets, demon strati on s, and lab act iv ities. A tes t w ill be give n ove r 10 and 20 motion afte r this unit.
Day 1 20 min lecture o n the conc epts of 2 0 mot ion. To pics to be covere d are the horizontal and vertic al components of th e moti on and ho w the y are rel ated . F rames of reference need s to be ad d res se d and the fac t tim e is indepe nden t of dire ct ion w hich need s to be demon strated . Demo 1 - Mo nkey Hunte r demo . See attac hed s heet for se tup lOmin - 15 min . Multi ple att emp ts at different spe e ds and dist ances. Simulation - 20 motion at PhET web site . Loo k at the ve loc ity and acceleratio n of a ball mo vin g in 20.
End the day with a review of 20 motion - question and answer session Da y 2 Demo 2 - 5-lOmi n Balli stic car - a moving car shoots a ball straight up into the air. The ball should land back in the cart. T his will go along with a qu ick review from Day 1
20-30min Lecture on how the equ ations relate to 2D moti on . E xampl e problems will take 1/2 to % of this time. Worksheet on 2D pro blems - see attached exampJe Given time in class to work so they can as k questions and ge t a good understandin g before they leave. Da y 3 Lab - see attached lab Spit c lass in two. H alf will do lab and the othe r will work on a worksheet. H alf-wa y through the class we will switch.
Wksht
Physics
Name
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1. A 2000kg car dri ves off a cliff at 35m/s. If the cli ff is 100ft high , how far away will the car land?
2. A plane is flying at 450mph due east. If the wind is blowin g at 60mph straight north, what is the actual velocity of the plane?
3. A marble rolls off a table with a velocit y of 5m/s. 1f the marble lands 3.3m from the table , how high is the table ?
4. A boat is mo ving directl y across the river at 8m1s . What is the actual velocity of the boat is the river is moving at 5m/s ?
5. A rocket blasts off with a velocity of 120mls. The engine stops ju st as it is leavin g the ground. How far away does the rocket land if the wind is blowing at 7m1s? The rocket does not have a parachute.
Extra credit. A golf ball is hit with a ve locity of 60m/s at an angl e of 30° to the ground. How far away does the ball hit the ground?
2D Motion Lab
Purpo se:
Materials:
An increased under standin g of how the vertical and horizontal components are related .
Ball , ramp, stopwatch, table, cup , and meter stick.
Procedure: I . Set up the ramp on the floor.
2. Measure one meter from the bottom of the ramp and mark the floor with a piece of tape. 3. Rele ase the ball from the top of the ramp and time how long it takes to go from the bottom of the ramp to the on meter mark . 4. Rep eat 3 times and find the average of the times. S. Find the velocity of the ball. 6. Gi ve the ball back to the instructor . 7. Move the ramp to the top of the table making sure to keep it at least 20cm from the edge of the table. 8. Using the equations we have leam calculate where the ball is going to hit the floor and place a cup there. 9. Get the instructor and test your results.
** Make sure to include
ca lculations in the lab report .
Conclusion : What were the result s? Did the lab work ? If not , why ? How cou ld the lab be improved? The se are a few question s you should think about while writing the conclusion.
